Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see the file Documentation/kbuild/kconfig-language.txt in the
   4 # Linux kernel source tree.
   5 #
   6 mainmenu "U-Boot $UBOOTVERSION Configuration"
   7
   8 config UBOOTVERSION
   9         string
  10         option env="UBOOTVERSION"
  11
  12 # Allow defaults in arch-specific code to override any given here
  13 source "arch/Kconfig"
  14
  15 menu "General setup"
  16
  17 config BROKEN
  18         bool
  19         help
  20           This option cannot be enabled. It is used as dependency
  21           for broken and incomplete features.
  22
  23 config DEPRECATED
  24         bool
  25         help
  26           This option cannot be enabled.  It it used as a dependency for
  27           code that relies on deprecated features that will be removed and
  28           the conversion deadline has passed.
  29
  30 config LOCALVERSION
  31         string "Local version - append to U-Boot release"
  32         help
  33           Append an extra string to the end of your U-Boot version.
  34           This will show up in your boot log, for example.
  35           The string you set here will be appended after the contents of
  36           any files with a filename matching localversion* in your
  37           object and source tree, in that order.  Your total string can
  38           be a maximum of 64 characters.
  39
  40 config LOCALVERSION_AUTO
  41         bool "Automatically append version information to the version string"
  42         default y
  43         help
  44           This will try to automatically determine if the current tree is a
  45           release tree by looking for Git tags that belong to the current
  46           top of tree revision.
  47
  48           A string of the format -gxxxxxxxx will be added to the localversion
  49           if a Git-based tree is found.  The string generated by this will be
  50           appended after any matching localversion* files, and after the value
  51           set in CONFIG_LOCALVERSION.
  52
  53           (The actual string used here is the first eight characters produced
  54           by running the command:
  55
  56             $ git rev-parse --verify HEAD
  57
  58           which is done within the script "scripts/setlocalversion".)
  59
  60 config CC_OPTIMIZE_FOR_SIZE
  61         bool "Optimize for size"
  62         default y
  63         help
  64           Enabling this option will pass "-Os" instead of "-O2" to gcc
  65           resulting in a smaller U-Boot image.
  66
  67           This option is enabled by default for U-Boot.
  68
  69 config CC_COVERAGE
  70         bool "Enable code coverage analysis"
  71         depends on SANDBOX
  72         help
  73           Enabling this option will pass "--coverage" to gcc to compile
  74           and link code instrumented for coverage analysis.
  75
  76 config DISTRO_DEFAULTS
  77         bool "Select defaults suitable for booting general purpose Linux distributions"
  78         select AUTO_COMPLETE
  79         select CMDLINE_EDITING
  80         select CMD_BOOTI if ARM64
  81         select CMD_BOOTZ if ARM && !ARM64
  82         select CMD_DHCP if CMD_NET
  83         select CMD_ENV_EXISTS
  84         select CMD_EXT2
  85         select CMD_EXT4
  86         select CMD_FAT
  87         select CMD_FS_GENERIC
  88         select CMD_PART if PARTITIONS
  89         select CMD_PING if CMD_NET
  90         select CMD_PXE if NET
  91         select ENV_VARS_UBOOT_CONFIG
  92         select HUSH_PARSER
  93         select SUPPORT_RAW_INITRD
  94         select SYS_LONGHELP
  95         imply CMD_MII if NET
  96         imply USB_STORAGE
  97         imply USE_BOOTCOMMAND
  98         help
  99           Select this to enable various options and commands which are suitable
 100           for building u-boot for booting general purpose Linux distributions.
 101
 102 config ENV_VARS_UBOOT_CONFIG
 103         bool "Add arch, board, vendor and soc variables to default environment"
 104         help
 105           Define this in order to add variables describing the
 106           U-Boot build configuration to the default environment.
 107           These will be named arch, cpu, board, vendor, and soc.
 108           Enabling this option will cause the following to be defined:
 109           - CONFIG_SYS_ARCH
 110           - CONFIG_SYS_CPU
 111           - CONFIG_SYS_BOARD
 112           - CONFIG_SYS_VENDOR
 113           - CONFIG_SYS_SOC
 114
 115 config NR_DRAM_BANKS
 116         int "Number of DRAM banks"
 117         default 4
 118         help
 119           This defines the number of DRAM banks.
 120
 121 config SYS_BOOT_GET_CMDLINE
 122         bool "Enable kernel command line setup"
 123         help
 124           Enables allocating and saving kernel cmdline in space between
 125           "bootm_low" and "bootm_low" + BOOTMAPSZ.
 126
 127 config SYS_BOOT_GET_KBD
 128         bool "Enable kernel board information setup"
 129         help
 130           Enables allocating and saving a kernel copy of the bd_info in
 131           space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
 132
 133 config SYS_MALLOC_F
 134         bool "Enable malloc() pool before relocation"
 135         default y if DM
 136
 137         help
 138           Before relocation, memory is very limited on many platforms. Still,
 139           we can provide a small malloc() pool if needed. Driver model in
 140           particular needs this to operate, so that it can allocate the
 141           initial serial device and any others that are needed.
 142
 143 config SYS_MALLOC_F_LEN
 144         hex "Size of malloc() pool before relocation"
 145         depends on SYS_MALLOC_F
 146         default 0x1000 if AM33XX
 147         default 0x2800 if SANDBOX
 148         default 0x400
 149         help
 150           Before relocation, memory is very limited on many platforms. Still,
 151           we can provide a small malloc() pool if needed. Driver model in
 152           particular needs this to operate, so that it can allocate the
 153           initial serial device and any others that are needed.
 154
 155 config SYS_MALLOC_LEN
 156         hex "Define memory for Dynamic allocation"
 157         depends on ARCH_ZYNQ || ARCH_VERSAL || ARCH_STM32MP
 158         help
 159           This defines memory to be allocated for Dynamic allocation
 160           TODO: Use for other architectures
 161
 162 config SPL_SYS_MALLOC_F_LEN
 163         hex "Size of malloc() pool in SPL before relocation"
 164         depends on SYS_MALLOC_F
 165         default 0x2800 if RCAR_GEN3
 166         default SYS_MALLOC_F_LEN
 167         help
 168           Before relocation, memory is very limited on many platforms. Still,
 169           we can provide a small malloc() pool if needed. Driver model in
 170           particular needs this to operate, so that it can allocate the
 171           initial serial device and any others that are needed.
 172
 173 config TPL_SYS_MALLOC_F_LEN
 174         hex "Size of malloc() pool in TPL before relocation"
 175         depends on SYS_MALLOC_F
 176         default SYS_MALLOC_F_LEN
 177         help
 178           Before relocation, memory is very limited on many platforms. Still,
 179           we can provide a small malloc() pool if needed. Driver model in
 180           particular needs this to operate, so that it can allocate the
 181           initial serial device and any others that are needed.
 182
 183 menuconfig EXPERT
 184         bool "Configure standard U-Boot features (expert users)"
 185         default y
 186         help
 187           This option allows certain base U-Boot options and settings
 188           to be disabled or tweaked. This is for specialized
 189           environments which can tolerate a "non-standard" U-Boot.
 190           Use this only if you really know what you are doing.
 191
 192 if EXPERT
 193         config SYS_MALLOC_CLEAR_ON_INIT
 194         bool "Init with zeros the memory reserved for malloc (slow)"
 195         default y
 196         help
 197           This setting is enabled by default. The reserved malloc
 198           memory is initialized with zeros, so first malloc calls
 199           will return the pointer to the zeroed memory. But this
 200           slows the boot time.
 201
 202           It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
 203           value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
 204           Then the boot time can be significantly reduced.
 205           Warning:
 206           When disabling this, please check if malloc calls, maybe
 207           should be replaced by calloc - if one expects zeroed memory.
 208
 209 config TOOLS_DEBUG
 210         bool "Enable debug information for tools"
 211         help
 212           Enable generation of debug information for tools such as mkimage.
 213           This can be used for debugging purposes. With debug information
 214           it is possible to set breakpoints on particular lines, single-step
 215           debug through the source code, etc.
 216
 217 endif # EXPERT
 218
 219 config PHYS_64BIT
 220         bool "64bit physical address support"
 221         help
 222           Say Y here to support 64bit physical memory address.
 223           This can be used not only for 64bit SoCs, but also for
 224           large physical address extension on 32bit SoCs.
 225
 226 config BUILD_ROM
 227         bool "Build U-Boot as BIOS replacement"
 228         depends on X86
 229         help
 230           This option allows to build a ROM version of U-Boot.
 231           The build process generally requires several binary blobs
 232           which are not shipped in the U-Boot source tree.
 233           Please, see doc/README.x86 for details.
 234
 235 config SPL_IMAGE
 236         string "SPL image used in the combined SPL+U-Boot image"
 237         default "spl/boot.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
 238         default "spl/u-boot-spl.bin"
 239         help
 240           Select the SPL build target that shall be generated by the SPL
 241           build process (default spl/u-boot-spl.bin). This image will be
 242           used to generate a combined image with SPL and main U-Boot
 243           proper as one single image.
 244
 245 config BUILD_TARGET
 246         string "Build target special images"
 247         default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_ARRIA10
 248         default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_GEN5
 249         default "u-boot-spl.kwb" if ARCH_MVEBU && SPL
 250         default "u-boot-elf.srec" if RCAR_GEN3
 251         default "u-boot.itb" if SPL_LOAD_FIT && ARCH_SUNXI
 252         default "u-boot.kwb" if KIRKWOOD
 253         default "u-boot-with-spl.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
 254         help
 255           Some SoCs need special image types (e.g. U-Boot binary
 256           with a special header) as build targets. By defining
 257           CONFIG_BUILD_TARGET in the SoC / board header, this
 258           special image will be automatically built upon calling
 259           make / buildman.
 260
 261 endmenu         # General setup
 262
 263 menu "Boot images"
 264
 265 config ANDROID_BOOT_IMAGE
 266         bool "Enable support for Android Boot Images"
 267         default y if FASTBOOT
 268         help
 269           This enables support for booting images which use the Android
 270           image format header.
 271
 272 config FIT
 273         bool "Support Flattened Image Tree"
 274         select MD5
 275         select SHA1
 276         help
 277           This option allows you to boot the new uImage structure,
 278           Flattened Image Tree.  FIT is formally a FDT, which can include
 279           images of various types (kernel, FDT blob, ramdisk, etc.)
 280           in a single blob.  To boot this new uImage structure,
 281           pass the address of the blob to the "bootm" command.
 282           FIT is very flexible, supporting compression, multiple images,
 283           multiple configurations, verification through hashing and also
 284           verified boot (secure boot using RSA).
 285
 286 if FIT
 287
 288 config FIT_EXTERNAL_OFFSET
 289         hex "FIT external data offset"
 290         default 0x0
 291         help
 292           This specifies a data offset in fit image.
 293           The offset is from data payload offset to the beginning of
 294           fit image header. When specifies a offset, specific data
 295           could be put in the hole between data payload and fit image
 296           header, such as CSF data on i.MX platform.
 297
 298 config FIT_ENABLE_SHA256_SUPPORT
 299         bool "Support SHA256 checksum of FIT image contents"
 300         default y
 301         select SHA256
 302         help
 303           Enable this to support SHA256 checksum of FIT image contents. A
 304           SHA256 checksum is a 256-bit (32-byte) hash value used to check that
 305           the image contents have not been corrupted. SHA256 is recommended
 306           for use in secure applications since (as at 2016) there is no known
 307           feasible attack that could produce a 'collision' with differing
 308           input data. Use this for the highest security. Note that only the
 309           SHA256 variant is supported: SHA512 and others are not currently
 310           supported in U-Boot.
 311
 312 config FIT_SIGNATURE
 313         bool "Enable signature verification of FIT uImages"
 314         depends on DM
 315         select HASH
 316         select RSA
 317         help
 318           This option enables signature verification of FIT uImages,
 319           using a hash signed and verified using RSA. If
 320           CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
 321           hashing is available using hardware, then the RSA library will use
 322           it. See doc/uImage.FIT/signature.txt for more details.
 323
 324           WARNING: When relying on signed FIT images with a required signature
 325           check the legacy image format is disabled by default, so that
 326           unsigned images cannot be loaded. If a board needs the legacy image
 327           format support in this case, enable it using
 328           CONFIG_IMAGE_FORMAT_LEGACY.
 329
 330 config FIT_SIGNATURE_MAX_SIZE
 331         hex "Max size of signed FIT structures"
 332         depends on FIT_SIGNATURE
 333         default 0x10000000
 334         help
 335           This option sets a max size in bytes for verified FIT uImages.
 336           A sane value of 256MB protects corrupted DTB structures from overlapping
 337           device memory. Assure this size does not extend past expected storage
 338           space.
 339
 340 config FIT_ENABLE_RSASSA_PSS_SUPPORT
 341         bool "Support rsassa-pss signature scheme of FIT image contents"
 342         depends on FIT_SIGNATURE
 343         default n
 344         help
 345           Enable this to support the pss padding algorithm as described
 346           in the rfc8017 (https://tools.ietf.org/html/rfc8017).
 347
 348 config FIT_VERBOSE
 349         bool "Show verbose messages when FIT images fail"
 350         help
 351           Generally a system will have valid FIT images so debug messages
 352           are a waste of code space. If you are debugging your images then
 353           you can enable this option to get more verbose information about
 354           failures.
 355
 356 config FIT_BEST_MATCH
 357         bool "Select the best match for the kernel device tree"
 358         help
 359           When no configuration is explicitly selected, default to the
 360           one whose fdt's compatibility field best matches that of
 361           U-Boot itself. A match is considered "best" if it matches the
 362           most specific compatibility entry of U-Boot's fdt's root node.
 363           The order of entries in the configuration's fdt is ignored.
 364
 365 config FIT_IMAGE_POST_PROCESS
 366         bool "Enable post-processing of FIT artifacts after loading by U-Boot"
 367         depends on TI_SECURE_DEVICE
 368         help
 369           Allows doing any sort of manipulation to blobs after they got extracted
 370           from FIT images like stripping off headers or modifying the size of the
 371           blob, verification, authentication, decryption etc. in a platform or
 372           board specific way. In order to use this feature a platform or board-
 373           specific implementation of board_fit_image_post_process() must be
 374           provided. Also, anything done during this post-processing step would
 375           need to be comprehended in how the images were prepared before being
 376           injected into the FIT creation (i.e. the blobs would have been pre-
 377           processed before being added to the FIT image).
 378
 379 if SPL
 380
 381 config SPL_FIT
 382         bool "Support Flattened Image Tree within SPL"
 383         depends on SPL
 384         select SPL_OF_LIBFDT
 385
 386 config SPL_FIT_PRINT
 387         bool "Support FIT printing within SPL"
 388         depends on SPL_FIT
 389         help
 390           Support printing the content of the fitImage in a verbose manner in SPL.
 391
 392 config SPL_FIT_SIGNATURE
 393         bool "Enable signature verification of FIT firmware within SPL"
 394         depends on SPL_DM
 395         select SPL_FIT
 396         select SPL_RSA
 397
 398 config SPL_LOAD_FIT
 399         bool "Enable SPL loading U-Boot as a FIT (basic fitImage features)"
 400         select SPL_FIT
 401         help
 402           Normally with the SPL framework a legacy image is generated as part
 403           of the build. This contains U-Boot along with information as to
 404           where it should be loaded. This option instead enables generation
 405           of a FIT (Flat Image Tree) which provides more flexibility. In
 406           particular it can handle selecting from multiple device tree
 407           and passing the correct one to U-Boot.
 408
 409 config SPL_LOAD_FIT_FULL
 410         bool "Enable SPL loading U-Boot as a FIT (full fitImage features)"
 411         select SPL_FIT
 412         help
 413           Normally with the SPL framework a legacy image is generated as part
 414           of the build. This contains U-Boot along with information as to
 415           where it should be loaded. This option instead enables generation
 416           of a FIT (Flat Image Tree) which provides more flexibility. In
 417           particular it can handle selecting from multiple device tree
 418           and passing the correct one to U-Boot.
 419
 420 config SPL_FIT_IMAGE_POST_PROCESS
 421         bool "Enable post-processing of FIT artifacts after loading by the SPL"
 422         depends on SPL_LOAD_FIT
 423         help
 424           Allows doing any sort of manipulation to blobs after they got extracted
 425           from the U-Boot FIT image like stripping off headers or modifying the
 426           size of the blob, verification, authentication, decryption etc. in a
 427           platform or board specific way. In order to use this feature a platform
 428           or board-specific implementation of board_fit_image_post_process() must
 429           be provided. Also, anything done during this post-processing step would
 430           need to be comprehended in how the images were prepared before being
 431           injected into the FIT creation (i.e. the blobs would have been pre-
 432           processed before being added to the FIT image).
 433
 434 config SPL_FIT_SOURCE
 435         string ".its source file for U-Boot FIT image"
 436         depends on SPL_FIT
 437         help
 438           Specifies a (platform specific) FIT source file to generate the
 439           U-Boot FIT image. This could specify further image to load and/or
 440           execute.
 441
 442 config SPL_FIT_GENERATOR
 443         string ".its file generator script for U-Boot FIT image"
 444         depends on SPL_FIT
 445         default "board/sunxi/mksunxi_fit_atf.sh" if SPL_LOAD_FIT && ARCH_SUNXI
 446         default "arch/arm/mach-rockchip/make_fit_atf.py" if SPL_LOAD_FIT && ARCH_ROCKCHIP
 447         help
 448           Specifies a (platform specific) script file to generate the FIT
 449           source file used to build the U-Boot FIT image file. This gets
 450           passed a list of supported device tree file stub names to
 451           include in the generated image.
 452
 453 endif # SPL
 454
 455 endif # FIT
 456
 457 config IMAGE_FORMAT_LEGACY
 458         bool "Enable support for the legacy image format"
 459         default y if !FIT_SIGNATURE
 460         help
 461           This option enables the legacy image format. It is enabled by
 462           default for backward compatibility, unless FIT_SIGNATURE is
 463           set where it is disabled so that unsigned images cannot be
 464           loaded. If a board needs the legacy image format support in this
 465           case, enable it here.
 466
 467 config OF_BOARD_SETUP
 468         bool "Set up board-specific details in device tree before boot"
 469         depends on OF_LIBFDT
 470         help
 471           This causes U-Boot to call ft_board_setup() before booting into
 472           the Operating System. This function can set up various
 473           board-specific information in the device tree for use by the OS.
 474           The device tree is then passed to the OS.
 475
 476 config OF_SYSTEM_SETUP
 477         bool "Set up system-specific details in device tree before boot"
 478         depends on OF_LIBFDT
 479         help
 480           This causes U-Boot to call ft_system_setup() before booting into
 481           the Operating System. This function can set up various
 482           system-specific information in the device tree for use by the OS.
 483           The device tree is then passed to the OS.
 484
 485 config OF_STDOUT_VIA_ALIAS
 486         bool "Update the device-tree stdout alias from U-Boot"
 487         depends on OF_LIBFDT
 488         help
 489           This uses U-Boot's serial alias from the aliases node to update
 490           the device tree passed to the OS. The "linux,stdout-path" property
 491           in the chosen node is set to point to the correct serial node.
 492           This option currently references CONFIG_CONS_INDEX, which is
 493           incorrect when used with device tree as this option does not
 494           exist / should not be used.
 495
 496 config SYS_EXTRA_OPTIONS
 497         string "Extra Options (DEPRECATED)"
 498         help
 499           The old configuration infrastructure (= mkconfig + boards.cfg)
 500           provided the extra options field. If you have something like
 501           "HAS_BAR,BAZ=64", the optional options
 502             #define CONFIG_HAS
 503             #define CONFIG_BAZ  64
 504           will be defined in include/config.h.
 505           This option was prepared for the smooth migration from the old
 506           configuration to Kconfig. Since this option will be removed sometime,
 507           new boards should not use this option.
 508
 509 config SYS_TEXT_BASE
 510         depends on !NIOS2 && !XTENSA
 511         depends on !EFI_APP
 512         default 0x80800000 if ARCH_OMAP2PLUS || ARCH_K3
 513         default 0x4a000000 if ARCH_SUNXI && !MACH_SUN9I && !MACH_SUN8I_V3S
 514         default 0x2a000000 if ARCH_SUNXI && MACH_SUN9I
 515         default 0x42e00000 if ARCH_SUNXI && MACH_SUN8I_V3S
 516         hex "Text Base"
 517         help
 518           The address in memory that U-Boot will be running from, initially.
 519
 520
 521
 522 config SYS_CLK_FREQ
 523         depends on ARC || ARCH_SUNXI || MPC83xx
 524         int "CPU clock frequency"
 525         help
 526           TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
 527
 528 config ARCH_FIXUP_FDT_MEMORY
 529         bool "Enable arch_fixup_memory_banks() call"
 530         default y
 531         help
 532           Enable FDT memory map syncup before OS boot. This feature can be
 533           used for booting OS with different memory setup where the part of
 534           the memory location should be used for different purpose.
 535
 536 endmenu         # Boot images
 537
 538 source "api/Kconfig"
 539
 540 source "common/Kconfig"
 541
 542 source "cmd/Kconfig"
 543
 544 source "disk/Kconfig"
 545
 546 source "dts/Kconfig"
 547
 548 source "env/Kconfig"
 549
 550 source "net/Kconfig"
 551
 552 source "drivers/Kconfig"
 553
 554 source "fs/Kconfig"
 555
 556 source "lib/Kconfig"
 557
 558 source "test/Kconfig"